Finding the Fourth Proportional to 78,682.45, 108,581.76 and 42,872.43

Step by Step Solution

1. Step 1: Write the proportion equation
   78,682.45 : 108,581.76 = 42,872.43 : x
2. Step 2: Convert to fraction form
   78,682.45/108,581.76 = 42,872.43/x
3. Step 3: Cross multiply
   78,682.45x = 108,581.76 × 42,872.43
4. Step 4: Simplify right side
   78,682.45x = 4,655,164,205.57
5. Step 5: Solve for x
   x = 4,655,164,205.57/78,682.45
6. Step 6: Final answer
   x = 59,163.95